Degradation of N-Lauroyl-L-valine in Soil and the Effect of Sunlight and Ultraviolet Rays on N-Lauroyl-L-valine

抄録

The degradation of N-lauroyl-L-valine in soil and the effects of sunlight and ultraviolet radiation on this compound were studied. When N-lauroyl-L-valine was added to the soil extract, a precipitate was observed. The precipitate was thought to be a salt formed from one calcium atom and two molecules of N-lauroyl-L-valine. These data indicated that N-lauroyl-L-valine was absorbed firmly in the soil. Qualitative analysis of compounds formed during incubation of soil with N-lauroyl-L-valine was investigated by gas chromato-graphy. Laurie acid (C₁₂) and capric acid (C₁₀) were detected in the medium after incubation. The amino acid could be determined quantitatively by a microbial assay method. The experiment using N-lauroyl-L-valine (¹⁴C) indicated that ¹⁴CO₂ was produced as a final product. These data suggested that N-lauroyl-L-valine was spilt to lauric acid and L-valine, and the lauric acid was degraded to CO₂ through capric acid by β-oxidation. The parent compound, N-lauroyl-L-valine was stable to sunlight and ultraviolet rays.